Outdoor Water Solutions PSP0152 Lake and Pond Bacteria Trial Pack Includes: 6-pound of bacteria in 12 water soluble bags packed in a barley straw medium Easy to apply, dissolves within 5-minutes of placing in water Safe for fish and plants Breaks down dead algae Reduces most odors PSP0152 Includes: 6-pound of bacteria in 12 water soluble bags packed in a barley straw medium Easy to apply, dissolves within 5-minutes of placing in water Safe for fish and plants Breaks down dead algae